マイクロ波自由空間法によりプラズマの電子密度を測定する場合の測定確度について
1965 年 14 巻 4 号 p. 433-456
詳細
1965 年 14 巻 4 号 p. 433-456
Electron density measurements of steady state helium plasmas in glass cylinders 17 to 96mm in diameter are made at 34GC and at pressures of 0.08 to 1.0mmHg and densities of about 5×1010 to 1012 cm-3.
Standard pyramidal horns of 20db gain and teflon lenses about 75mm in diameter are used. Errors arising from the multiple reflection between antennas and the spreading of microwave beams incident on plasmas are investigated. It is shown that the reliability of more than 90% is attainable for low density plasmas when an, appropriate use is made of the free space method. The reliability obtained by Langmuir probe method is taken as reference.
